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An important feature of digital cameras is battery life, the number of shots that can be taken before the battery needs to be recharged. The file contains battery life information for 29 subcompact cameras and 16 compact cameras.(Data extracted from œDigital Cameras, Consumer Reports, July 2009, pp. 28-29)
a. Is there evidence of a difference in the variability of the battery life between the two types of digital cameras? (Use ±=0.05)
b. Determine the p-value in (a) and interpret its meaning.
c. What assumption about the population distribution of the two types of cameras is necessary in a)? Is the assumption valid for these data?
d. Based on the results of (a), which t test should you use to compare the mean battery life of the two types of cameras?
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Given the following data, compute the expected value for company C's EPS. Information for Firms A nand B are as follows: E=$5.10, and oA=$3.61; E=$4.20,
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You would like to know what the marginal costs and marginal benefits of this decision are. That should depend on factors like:
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The current fare market price of $45 can not be increased. Compute current industry output and the market share of each airline
Who were the muckrakers, and what contributions did they make? Overall, what impact did these contributions have on the Progressive movement at large?
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